The module KNX-LUNOS-CONTROL4 enables triggering of the decentralized ventilation units with heat recovery e² and e90 and the exhaust air fan RA 15-60 via the KNX bus. Up to four fans can be operated with one module. Several modules can be linked to each other via the KNX bus to enable coordinate operation. Direct control of the fans is possible via the key inputs available. The module has an integrated KNX bus coupler and requires an external supply voltage. It is located in a plastic housing which can be installed into a switch box,. The module can be controlled via the KNX display Touch-IT r directly using a series switch. Automatic control without a switch via humidity or CO2 sensor is also possible. The Protection Class corresponds to IP 20.